n An algorithm that uses testset for Mutual Exclusion: n Shared variable b is initialized to 0 n Only the first Pi who sets b enter CS
				n A C++  description of test-and-set:
			bool testset(int& i) {   if (i==0) {     i=1;     return true;   } else {     return false;   } }
								Process Pi: repeat   repeat{}   until testset(b);      CS   b:=0;      RS forever